use explicit destination operands

Author: ZERICO2005

src/libc/fmal.src

@@ -11,12 +11,12 @@ _fmal:
 	add	iy, sp
 	ld	a, (iy + 28)
 	rlca
-	and	1
+	and	a, 1
 	ld	(iy + 11), a	; signC
 	ld	a, (iy + 10)
 	xor	a, (iy + 19)
 	rlca
-	and	1
+	and	a, 1
 	ld	(iy + 20), a	; signZ
 	jp	_softfloat_mulAddF64
 

src/libc/sqrtl.src

@@ -11,7 +11,7 @@ _sqrtl:
 	add	hl, sp
 	ld	a, (hl)
 	rlca
-	and	1
+	and	a, 1
 	inc	hl
 	ld	(hl), a
 	jp	___f64_sqrt